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EP1999337B1 - Interventionsfreies frac-system - Google Patents

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Publication number
EP1999337B1
EP1999337B1 EP07758589A EP07758589A EP1999337B1 EP 1999337 B1 EP1999337 B1 EP 1999337B1 EP 07758589 A EP07758589 A EP 07758589A EP 07758589 A EP07758589 A EP 07758589A EP 1999337 B1 EP1999337 B1 EP 1999337B1
Authority
EP
European Patent Office
Prior art keywords
plug
plugs
sleeve
tubular
unique
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
EP07758589A
Other languages
English (en)
French (fr)
Other versions
EP1999337A1 (de
Inventor
Douglas J. Murray
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Baker Hughes Holdings LLC
Original Assignee
Baker Hughes Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Baker Hughes Inc filed Critical Baker Hughes Inc
Publication of EP1999337A1 publication Critical patent/EP1999337A1/de
Application granted granted Critical
Publication of EP1999337B1 publication Critical patent/EP1999337B1/de
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/12—Packers; Plugs
    • E21B33/1208—Packers; Plugs characterised by the construction of the sealing or packing means
    • E21B33/1212—Packers; Plugs characterised by the construction of the sealing or packing means including a metal-to-metal seal element
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
    • E21B23/02—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for locking the tools or the like in landing nipples or in recesses between adjacent sections of tubing
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B34/00—Valve arrangements for boreholes or wells
    • E21B34/06—Valve arrangements for boreholes or wells in wells
    • E21B34/063—Valve or closure with destructible element, e.g. frangible disc
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B34/00—Valve arrangements for boreholes or wells
    • E21B34/06—Valve arrangements for boreholes or wells in wells
    • E21B34/14—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B2200/00—Special features related to earth drilling for obtaining oil, gas or water
    • E21B2200/06—Sleeve valves
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B2200/00—Special features related to earth drilling for obtaining oil, gas or water
    • E21B2200/08—Down-hole devices using materials which decompose under well-bore conditions

Definitions

  • the field of the invention is completion techniques and more particularly those involving sequential procedures in a zone which need periodic obstruction of the flow bore to conduct the operation and need the flow bore cleared thereafter for production.
  • Some completion methods require sequential isolation of adjacent zones in an interval to perform treatments such as tracing.
  • the zones are isolated with packers and in between them there are sliding sleeves that can be selectively opened to provide access.
  • this assembly is run in to position, and then a ball or plug is pumped down to the bottom which closes off the flow path through the bottom end of the liner. Pressure is applied and the packers are set, creating multiple isolated zones.
  • the tubular string is pressurized and the lowermost sliding sleeve is opened. After the lowermost zone is treated a ball is dropped on a lowermost seat to close off the zone just treated and the pressure is built up on this first dropped ball to open the next sliding sleeve up.
  • USP 5,660,232 and 5,425,424 Yet other designs that create selective access into a formation by using perforating charges that blow out plugs in casing or pressure actuated pistons with internal rupture discs are illustrated in USP 5,660,232 and 5,425,424 .
  • USP 6,769,491 illustrates a typical anchor assembly for a downhole tool.
  • the present invention seeks to streamline certain downhole operations by matching profiles on plugs to those on sliding sleeves or nipple profiles. This allows a specific plug to be located at a certain location and bypass other potential landing locations.
  • the flow path can be identical in size for the duration of the zone and yet different portions can be addressed in a particular sequence. Apart from that, the plugs, after having served their purpose, reopen the flow path for further operations.
  • a system allows for sequential treatment of sections of a zone. Access to each portion can be with a sliding sleeve that has a specific internal profile.
  • Pump down plugs can be used that have a specific profile that will make a plug latch to a specific sleeve. Pressure on the plug when latched allows a sequential opening of sleeves while zones already affected that are below are isolated.
  • the pump down plugs have a passage that is initially obstructed by a material that eventually disappears under anticipated well conditions. As a result, when all portions of a zone are handled a flow path is reestablished through the various latched plugs.
  • the plugs can also be blown clear of a sliding sleeve after operating it and can feature a key that subsequently prevents rotation of the plug on its axis in the event it later needs milling out.
  • Figure 1 is a section view of a pump down plug before it is pumped downhole
  • Figure 2 is the plug of Figure 1 with the passage through the plug open after the nose plug has disappeared;
  • Figure 3 is a section view of a typical sliding sleeve in the closed position
  • Figure 4 is a section view of the pump down plug landed on the sliding sleeve
  • Figure 5 is the view of Figure 4 with pressure applied and the sleeve shifted to an open position
  • Figure 6 is a section view of an alternative embodiment showing the sliding sleeve closed and the profile to receive the pump down plug;
  • Figure 7 is the view of Figure 6 with the pump down plug landed creating a piston around the sliding sleeve
  • Figure 8 is the view of Figure 7 with pressure applied that results in shifting the sliding sleeve
  • Figure 9 is a section of a pump down plug showing the disappearing portion in the nose
  • Figure 10 is a closer view of Figure 9 showing how the disappearing portion is attached to the pump down plug;
  • Figure 11 is a section of an alternative design of the disappearing component
  • Figures 12a-c are a section view of an alternative pump down plug design showing the plug landed in the sliding sleeve;
  • Figures 13a-c are the view of Figures 12a-c with the sliding sleeve shifted;
  • Figures 14a-c are the view of Figures 13a-c with the plug released from the sliding sleeve and captured on a landing collar;
  • Figure 15 is a part section perspective view showing the sliding sleeve and a groove that holds the pump down plug against turning if the plug is milled out;
  • Figure 16 is the pump down plug in perspective showing the lug that resists turning if the plug is milled out.
  • Figure 1 shows a typical pump down plug 10 that has wiper seals 12 and 14 to make contact with the surrounding tubular so that it can be pumped down.
  • cup seals are shown, other types and quantities of seals can be used.
  • the plug 10 has a tubular body 16 with a through passage 18. Near end 20 is a fishing neck 22 to be used if the plug 10 is to be fished out for any reason.
  • a series of longitudinal grooves 22 define flexible collet fingers 24 that are attached at opposed ends to body 16.
  • Cantilevered fingers can be alternatively used or any other structure that can maintain a cylindrical shape with sufficient strength and still allow flexing.
  • the flexing feature allows the protrusions 26 and 28 to move radially as the plug 10 is pumped downhole.
  • FIG. 3 there is a sliding sleeve 30 that has depressions 32 and 34 that are designed to match the shape of protrusions 26 and 28 on the plug 10. As the plug 10 approaches the sliding sleeve 30 the fingers 24 flex to let the protrusions 26 and 28 jump up on the sleeve 30 and then spring out into depressions 32 and 34 as radial surface 36 on projection 28 registers with radial surface 38 on depression 32.
  • FIG. 1 where the passage 18 is shown to be blocked by what will generically be referred to as a disappearing material 44.
  • the phrase disappearing material is intended to encompass a wide variety of materials used alone or in combination that can retain structural integrity during the pump down procedure but over time when subjected to well conditions whether existing or artificially created will lose that integrity and no longer block the passage 18, as shown in Figure 2 .
  • Threads 46 are visible in Figure 2 after the disappearing material 44 has gone away. They are used to initially retain the material 44 in position as shown in Figure 1 .
  • the preferred material 44 is a biopolymer that responds to well temperature.
  • Figures 4 and 5 show how a plug 10 with projections 26 and 28 registered with depressions 34 and 32 respectively can be used to shift sleeve 30 from the closed position with ports 48 closed in Figure 4 and where they are open in Figure 5 .
  • the material 44 continues to block passage 18 with ports 48 open so that a frac job for example can be accomplished through ports 48 with a zone isolated between two external packers 40 and 42.
  • a given plug has a profile on the fingers 24 that registers with a specific sliding sleeve profile in the embodiment of Figures 1-5 .
  • the concept is related to a key in a lock cylinder.
  • Combinations of protrusions and depressions can be used with either one being on the plug or the sleeve and the mating profile on the other member.
  • the registration can be determined by having a protrusion and mating depression have similar longitudinal lengths to make them register.
  • There can be more than one pair of protrusions and matching depressions and their spacing from each other can be unique to a given sliding sleeve and a plug that will match.
  • an easily milled disc can be provided instead of using the material 44 . While this way will require subsequent intervention after all the plugs are in place, the milling should go quickly if only the discs themselves are milled out and not the plugs that retain them. Thereafter, with the passage in each plug open, production can flow through them all. Any remnants from milling can be brought to the surface with this production.
  • FIG. 1-5 While the embodiment in Figures 1-5 registered with a given sleeve, the embodiment in Figures 6-8 registers with grooves 50 and 52 in the housing 54.
  • the sliding sleeve 56 initially covers ports 58 as seals 60 and 62 straddle the ports 58.
  • projection 68 initially registers with depression 64 to hold the sleeve 56 in the Figure 6 closed position.
  • Figure 7 shows a plug 74 that has projections 76 and 78 to match depressions 50 and 52 fully registered.
  • a given plug has a unique profile or pattern than is matched in the housing adjacent to a sleeve as opposed to literally on the sleeve in the case of Figures 1-5 to be sure a plug lands adjacent a desired sleeve to turn it into a piston so that pressure above it can force it to shift to open the associated ports.
  • the plug uses a disappearing material 80 that goes away after it is isolated by another plug latched above it.
  • the Figures 6-8 procedure is similar with the main difference being that in Figures 1-5 the plug literally moves the sleeve and in Figures 6-8 the latched plug allows pressure to force the sleeve open in a piston effect. In other respects the procedure is similar.
  • Figures 9 and 10 illustrate an embodiment for the disappearing material plug 44 or 80 illustrated in use in Figures 1-8 . Since the material needs some structural strength to withstand differential pressure during pumping procedures like a frac job, the design features alternating layers of a biopolymer 86 alternating with water soluble metal discs 88. In the assembly, the discs 88 are all internal. The biopolymer 86 has a relatively slow dissolving rate coupled with poor creep resistance. The discs 88 are fast dissolving but add strength and creep resistance. A retaining sleeve 90 engages thread 92 on housing 94 to compress the assembly within passage 96 for run in. Longitudinal compression creates a better peripheral seal in housing 94.
  • Figure 11 represents another construction for such a plug as an alternative to the one illustrated in Figures 9 and 10 .
  • the end components 98 and 100 are preferably a biopolymer with a relatively slow dissolving rate and poor creep resistance.
  • Sandwiched in between is a granular substance such as, for example, sand, frac proppant or glass micro spheres 102.
  • a directional load is placed on either end component 98 or 100 the applied stress is transferred to the layer 102 and due to shifting of the granular material the load is shifted outward against ring 104 that is secured to the housing 106 at thread 108 before it can migrate to the opposite end component. This helps to retain the sealing integrity of the assembly.
  • the ring 104 is used to initially longitudinally squeeze the assembly for better sealing. After exposure to well temperatures for a long enough period, the end components dissolve and production can be used to deliver the granular substance to the surface.
  • FIG 16 another optional feature of a plug 110 is illustrated.
  • a leading section 112 that has one or more projections 114 that are designed to enter a matching depression 116 seen in section in Figure 15 .
  • alignment ramps to interact between a plug 110 and the surrounding housing 118 to get the projection 114 to properly align with a depression 116 can be used.
  • the projection is on a flexible finger 120 and the purpose of the registration of parts is to prevent rotation if the plug is to be milled out for any reason, alignment device will not be necessary because some rotation induced from milling will result in registration of 114 with 116 as long as they are supported at the same elevation from the registration of projections 122 and 124 above.
  • Figures 12- 14 show the plug illustrated in Figure 16 (where the disappearing material is not shown in passage 126 ) used to shift a sleeve and then get off the sleeve and latch to a body just below the sleeve.
  • projection 128 is just below the bottom of sleeve 130 while projection 132 has engaged a radial surface 134 on the sleeve 130.
  • Figure 12c shows the offset at this time between the torque resisting projection 114' and the receiving recess 116'.
  • the sleeve 130 has not been shifted.
  • the sleeve 130 is now shifted to travel stop 136 with plug 138 still engaged at radial surface 134 of sleeve 130.
  • Yet another aspect of the present invention is to use progressively larger seats as described in USP 6,907,936 except to make the obstructing members of a disappearing material so that when all zones are treated, all the seats are reopened. While this embodiment has the disadvantage that without milling there are well obstructions that vary in size, it does retain an advantage over the method in the aforementioned patent in that production can begin without milling out balls on seats.
  • a plurality of nipple profiles that are unique can be placed in a casing string.
  • a pump down plug that supports a perforating gun can be delivered to register with a particular nipple profile whereupon registering at the proper location pressure above the now supported plug can fire the gun.
  • an interval can be perforated in a specific order and intervals already perforated can be isolated as other portions of the interval are perforated.
  • the sliding sleeves that have explosive charges to open access to the formation as described in USP 5,660,232 can be selectively operated with the pump down plugs described above that register with a discrete sleeve to open access to the formation in a desired order.
  • the technique can also be grafted to the sliding sleeves used in combination with telescoping, pistons as described in USP 5,425,424 to selectively shift them in a desired order using the techniques described above.

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  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
  • Reciprocating Pumps (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • Pressure Vessels And Lids Thereof (AREA)

Claims (22)

  1. Komplettierungsverfahren, umfassend:
    - Bereitstellen einer Vielzahl von Absetzstellen (30) innerhalb eines Rohrstrangs, von denen jede eine erste Hälfte (32, 34) einer einzigartigen Konfiguration ohne Bezug auf die Öffnungsgröße durch diese hindurch aufweist;
    - Anordnen des Rohrstrangs in dem Bohrloch;
    - Bereitstellen eine Vielzahl von Stopfen (10), die eine zweite Hälfte (26, 28) einer einzigartigen Konfiguration ohne Bezug auf den Durchmesser aufweisen, die mit einer der ersten Hälften der einzigartigen Konfiguration zusammenpasst;
    - Absetzen der Stopfen in einer spezifischen geordneten Sequenz basierend auf zusammenpassenden einzigartigen Konfigurationen zwischen jedem Stopfen und einer Gegenstückkonfiguration in dem Rohrstrang.
  2. Verfahren nach Anspruch 1, umfassend:
    - vorübergehendes Blockieren des Rohrstrangs nach dem Absetzen eines Stopfens.
  3. Verfahren nach Anspruch 2, umfassend:
    - Verwenden eines Verschwindestoffes (44) in einem Durchgang (18) in dem Stopfen, um den Rohrstrang vorübergehend zu blockieren.
  4. Verfahren nach Anspruch 3, umfassend:
    - Aufbringen von Druck auf den Stopfen, wenn er abgesetzt ist, um eine Bohrlochoperation durchzuführen.
  5. Verfahren nach Anspruch 4, umfassend:
    - Verwenden von Bohrlochbedingungen, um nach der Durchführung der Bohrlochoperation den Verschwindestoff verschwinden zu lassen.
  6. Verfahren nach Anspruch 5, umfassend:
    - Durchführen einer Bohrlochoperation über einem abgesetzten Stopfen, während der Rohrstrang unter dem Stopfen von der Operation isoliert wird, und Wiederholen des Prozesses, bis alle Stopfen abgesetzt worden sind.
  7. Verfahren nach Anspruch 6, umfassend:
    - Produktionsnahme durch Durchgänge in allen Stopfen, die kein Verschwindematerial mehr in sich aufweisen.
  8. Verfahren nach Anspruch 4, umfassend:
    - Setzen der ersten Hälften der einzigartigen Konfiguration auf eine Vielzahl von Gleithülsen (30).
  9. Verfahren nach Anspruch 8, umfassend:
    - Betätigen der Gleithülsen in einer vorherbestimmten Reihenfolge durch Absetzen von Stopfen, die eine vorherbestimmte Reihenfolge von zweiten Hälften von einzigartigen Konfigurationen aufweisen.
  10. Verfahren nach Anspruch 4, umfassend:
    - Setzen der ersten Hälften (32, 34) der einzigartigen Konfiguration in die Rohrwand;
    - Absetzen eines Stopfens mit einer zusammenpassenden Konfiguration einer zweiten Hälfte (26, 28) in dem Rohrstrang, so dass er in abdichtendem Kontakt mit einer Hülse steht;
    - Veranlassen, dass die Hülse aufgrund des Absetzens des in abdichtenden Kontakt stehenden Stopfens auf aufgebrachten Druck anspricht.
  11. Verfahren nach Anspruch 8, umfassend:
    - In-Eingriff-Bringen der Hülsen mit den Stopfen;
    - Verschieben der Hülsen durch Unter-Druck-Setzen der mit ihrer jeweiligen Hülse in Eingriff stehenden Stopfen;
    - Setzen der ersten Hälften der einzigartigen Konfiguration zusätzlich in die Rohrwand;
    - Konfigurieren der ersten Hälfte der einzigartigen Konfiguration in der Hülse so, dass sie den Stopfen nach dem Verschieben seiner Hülse freigibt;
    - In-Eingriff-Bringen des Stopfens mit der einzigartigen Konfiguration in der Rohrwand nach dem Verschieben der Hülse.
  12. Verfahren nach Anspruch 11, umfassend:
    - Drehverriegeln des Stopfens separat von einer gelagerten Position in der einzigartigen Konfiguration der Rohrwand.
  13. Verfahren nach Anspruch 1, umfassend:
    - Drehverriegeln der Stopfen nach dem Absetzen.
  14. Verfahren nach Anspruch 1, umfassend:
    - Verwenden eines Längszwischenraums zwischen einer Vielzahl von Vorsprüngen und eines zusammenpassenden Zwischenraums für Vertiefungen als die einzigartigen Konfigurationen.
  15. Verfahren nach Anspruch 1, umfassend:
    - Verwenden einer Längserstreckung von wenigstens einem Vorsprung und einer zusammenpassenden Erstreckung für wenigstens eine Vertiefung als die einzigartigen Konfigurationen.
  16. Verfahren nach Anspruch 1, umfassend:
    - elastisches Anbringen von wenigstens einer der Hälften einer einzigartigen Konfiguration, um ein Biegen in Radialrichtung zu erlauben.
  17. Verfahren nach Anspruch 3, umfassend:
    - Bilden eines Durchgangshindernisses (44) in dem Stopfen, das zumindest teilweise aus einem Biopolymer als dem Verschwindestoff hergestellt ist.
  18. Verfahren nach Anspruch 17, umfassend:
    - Isolieren von wenigstens einer wasserlöslichen Metallscheibe (88) zwischen Biopolymerenden;
    - Zusammendrücken der Enden gegeneinander.
  19. Verfahren nach Anspruch 17, umfassend:
    - Isolieren eines körnigen Materials (102) zwischen Biopolymerenden;
    - radiales Verteilen der Belastung aus dem Druck auf eines der Biopolymerenden zur Minimierung der Belastungsübertragung auf das gegenüberliegende Biopolymerende.
  20. Verfahren nach Anspruch 19, umfassend:
    - anfängliches Zusammendrücken der Enden gegeneinander;
    - Auflösen der Enden mit Fluiden in dem Bohrloch;
    - Entfernen des körnigen Materials durch Strömenlassen eines Produktionsfluids durch den Stopfendurchgang, der aufgrund des Auflösens jetzt offen ist.
  21. Verfahren nach Anspruch 20, umfassend:
    - Verwenden von wenigstens einem aus Sand, Frac-Stützmittel und Glasmikrokügelchen als das körnige Material.
  22. Verfahren nach Anspruch 2, umfassend:
    - Bereitstellen einer Barriere in einem Durchgang in den Stopfen;
    - Aufbringen von Druck auf den Stopfen, wenn er abgesetzt ist, um eine Bohrlochoperation durchzuführen;
    - Herausfräsen der Barriere in dem Durchgang aus den Stopfen, nachdem der letzte Stopfen platziert ist;
    - Produktionsnahme durch die Durchgänge.
EP07758589A 2006-03-24 2007-03-15 Interventionsfreies frac-system Expired - Fee Related EP1999337B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/388,847 US7325617B2 (en) 2006-03-24 2006-03-24 Frac system without intervention
PCT/US2007/064050 WO2007112211A1 (en) 2006-03-24 2007-03-15 Frac system without intervention

Publications (2)

Publication Number Publication Date
EP1999337A1 EP1999337A1 (de) 2008-12-10
EP1999337B1 true EP1999337B1 (de) 2009-10-07

Family

ID=38141199

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07758589A Expired - Fee Related EP1999337B1 (de) 2006-03-24 2007-03-15 Interventionsfreies frac-system

Country Status (11)

Country Link
US (3) US7325617B2 (de)
EP (1) EP1999337B1 (de)
CN (1) CN101443529B (de)
AU (1) AU2007230749B2 (de)
CA (1) CA2646705C (de)
DE (1) DE602007002700D1 (de)
DK (1) DK1999337T3 (de)
EA (1) EA013495B1 (de)
MX (1) MX2008012179A (de)
NO (1) NO20084051L (de)
WO (1) WO2007112211A1 (de)

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WO2017060292A1 (en) * 2015-10-06 2017-04-13 Welltec A/S Downhole flow device
RU2725207C2 (ru) * 2015-10-06 2020-06-30 Веллтек А/С Скважинное поточное устройство

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CN101443529A (zh) 2009-05-27
US7552779B2 (en) 2009-06-30
US20070261862A1 (en) 2007-11-15
AU2007230749B2 (en) 2011-08-04
EA013495B1 (ru) 2010-04-30
WO2007112211A1 (en) 2007-10-04
EP1999337A1 (de) 2008-12-10
CA2646705A1 (en) 2007-10-04
DK1999337T3 (da) 2010-01-25
DE602007002700D1 (en) 2009-11-19
CN101443529B (zh) 2012-08-01
NO20084051L (no) 2008-10-16
US20070221384A1 (en) 2007-09-27
US7395856B2 (en) 2008-07-08
CA2646705C (en) 2011-05-17
AU2007230749A1 (en) 2007-10-04
US7325617B2 (en) 2008-02-05
US20070221373A1 (en) 2007-09-27
MX2008012179A (es) 2008-11-06
EA200801941A1 (ru) 2009-04-28

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